NASHVILLE, Tenn. (AP) — Cameron Thomas scored 21 points and third-seeded LSU upset eighth-ranked Arkansas 78-71 Saturday to reach the Southeastern Conference Tournament championship for the first time since 1993. The Tigers will play No. 6 Alabama on Sunday looking for their first SEC tournament title since 1980. LSU gave its top scorer more help in a matchup of the SEC’s top scoring teams. Javonte Smart added 19 points for LSU, and Darius Days had 13. Arkansas snapped a 12-game SEC winning streak that tied the program record set by the 1993-94 team that also ended in the SEC Tournament in the semifinals.